OpenBSD is a free and open source Unix-like computer operating system descended from Berkeley Software Distribution (BSD).
License: Open Source
Haiku is primarily designed as a user-friendly desktop operating system with a focus on simplicity and ease of use, while OpenBSD is a security-focused operating system aimed at server and network environments. OpenBSD offers robust security features and a strong networking stack, making it suitable for high-security applications, whereas Haiku is better suited for users seeking a modern desktop experience.